Doffing yarn-clamp for spinning-mules.



A. F. POIRIER & T. J. MONROE.

DOFFING YARN CLAMP FOR SPINNING MULES.

APPLICATION FILED NOV-1,1916.

Patented Dec. 17, 1918.

2 SHEETS-SHEET I.

E Mona '06,

a/ddm 7" 2 figs Invenfars Arthuiflfinimier Thoma A. F. POlRIER & T. J. MONROE.

DOFHNG YARN CLAMP FOR SPINNING MULES.

APPLICATION FILED NOV. 1, 1916.

1,288,180,, Patented Dec. 17, 1918.

2 SHEETS-SHEET 2.

' ArfihurFPoiner Q J Thom as JlMonmge, M b I )WaZ/ar 1 H 23m, "in. M Ts...

ARTHUR F. IPUIIEZEEEZI ZZ'HUMAS J. MONROE, 431E LEWISTGN', MAINE, ASSIGR'QRS 01" ONE-THIRD T0 HARRY MANSER, 0F AUBUFIN, MAINE. I

DQFFING YARN-GLA'MP FOR, SPINNING-MUEES.

Specification of Letters Patent.

Patented Dec. 1'3, 1918.

Application filed Nbvemberl, 1916. Serial No. 128,993.

To all whom it may concern:

Be it known that we, ARTHUR F. Pommn and THOMAS J. MONROE, subjects of the King of Great Britain, and residents of Lewiston, Maine, have invented certain new and useful Improvements in Dofling Yarn-Clamps for Spinning-Mules, of which the following is a specification.

Our invention relates to spinning mules and particularly to means for automatically catchin and holding the yarn when dofling is to ta e place, so that the new bobbin may be properly supplied with yarn in starting the winding.

While appliances have been devised and patented for this general purposeour ob ect is to provide a simple form of device capable of application to existing spinning mules and which will present certain advantages as will hereinafter appear.

The invention consists in the features and combination and arrangement of parts as will be described hereinafter and particularly pointed out in the claims.

In the accompanying drawings;

'Figure 1 is a sectional view through the collar board with the yarn clamp lowered and the spindle in the act of winding the yarn on th bobbin.

Fig. 2 is a view similar to Fig. 1, with the faller wires lowered and the yarn clamped ready for the dotfing operation to be performed.

Fig. 2 is a detail sectional view of the bobbin holder and associated parts.

Fig. 3 is a front view of two spindles, the clamp plate and associated devices, this view being taken along the line a;.r of Fig. 1.

Fig. 4 is a plan view of the clamp plate with the clamping rings mounted therein.

Fig. 5 is a perspective view of another form of clamp ring support, whereby the rings individually accommodate themselves to different heights of bobbin holders.

Fig. 6 is a sectional view of one of the parts shown in Fig. 5.

In these drawings, 1 is the collar board, 2 the spindle, 3 the bobbin holder mounted on the spindle, 4, the whirl, 5 the lower bearing for the spindle, and 6, 7 are the faller wires carried by the faller arms 8, 9, mounted on the rock shafts 10, 11, journaled in suitable \bearings of the frame, all as in ordinary practice.

Below the bobbin holders or sockets 3 we mount fixedly on each rotary spindle a cone 12 in inverted position, i. c. with the small .end down, and between the large upper end of these cones and the bottoms of the bobbin holders or sockets 3 we mount washers 3", of suitable fiexible material, such as leather or felt or cloth. These washers are of slightly greater diameter than the diameter of the sockets or bobbin holders.

A clamp plate 13 is arranged below the bobbin holders and this is carried by arms 14, pivotally mounted at 15 on brackets or suitable parts of the fixed frame, said arms being under tension of springs 16 tending constantly to raise the clamp plate.

The clamp plate carries clamping members adapted to have rotary movement therein and these consist in the particular embodiment of our invention illustrated of ring-like members havingupper and lower flanges 17, 18 overlying the adjacent faces of the clamp plate, the connecting sleeveportion of said clamping members being of substantially the same diameter as the circular openings in the clamp plate, so that the rings may have turning movement but will be held securely in the clamp plate, against axial displacement. v 5

These clamp rings encircle the inverted cones on the spindles, their openings being large enough in diameter so that the large end of the cone will fit therein,and the yarn will not only be clamped between the ring andthe leather or cloth washer but the cone will also play a part in this clamping effect, the yarn being held between the cone and the ring as well as between the ring and the moved breaking the yarn, but the loose end will be held clamped by the parts just mentioned and upon placing a new bobbin in the holder and operatin the fallers the new end of the yarn will raw onto the new bobbin for a few turns, until. it is sufliciently secured, after which the customary operation of the mule will be proceeded with. In this preliminary winding operation to secure the new end of yarn onto the new bobbm the ring form of clamping member may rotate and thus prevent the new end from breaking before the new end is securely engaged on the new bobbin. Any yarn which has a tendency to stick to thecone will be shed therefrom because of its tapered formation, and proper lubrication will not be interfered with.

The clamping plate with its clamping rings is held down normally by dogs or catches 19 on a rod 20 capable of being slid longitudinally to position the dogs over the arms of-the clamping plate to hold them down or to one side thereof to allow the springs to raise said arms.

By our invention waste will be prevented because the clamping rings acting in conjunction with the washers and cones will hold a short extension or end of the yarn and it will not be necessary to wind the new portion of the yarn about the spindle.

In Figs. 5 and 6 is shown another form of the mounting of the clamping rings. In the form first described all of the clamping rings are raised in the operation of clamping to exactly the same level or height because they are all mounted upon the same bar. The bobbin holders, however, may not be exactly on the same level and consequently some of the clamping rings will come in contact with the clamping washersat the bottoms of the holders while other rings will not contact properly with their holders and a proper clamping ettect will not be secured. with the form of mounting shown in Figs. 5 and 6, however, each clamping ring will perform a proper clamping action. For this purpose the rings are mounted individually in arms 21, there being a separate arm for each ring, and each of the arms is made in sections as at 22, at that portion thereof which forms the seat for the ring. The removable section of the arm or seat for the ring is held to the other sections by pins or bolts or in any other suitable way which will permit the removal of a section in order to introduce the ring to its seat formed by the attached sections. Each of the arms or holders is pivotally mounted in a fork or bracket 23 individual thereto and each arm has a tail portion 24 extending back of its pivot and between the arms of the fork or bracket, and this tail portion of each holder is borne upon by a spring 24* individual thereto which tends to hold the arm or support in its raised position relative to the reeareo bracket. Any suitable form of stop as at 25 may be provided to determine the position of the arm or ring seat support in relation to its holding bracket. The brackets or forks are mounted upon a rod or shaft indicated at 26, which when turned will raise all of the brackets with their pivotallymounted arms to thus elevate the clamping rings carried by said arms to the bobbin holders, and should there be a variation in the position of the different holders the arms belonging to those holders which are in a lower plane than the others will simply yield downwardly relatively when their clamping rings contact with the clamping washers and this yielding will therefore not interfere with the elevation of the arms with their clamping rings belonging to the holders which are in a slightly higher plane. In other words, the construction shown in Figs. 5 and 6 provides for the clamping rings accommodating themselves individually tothe level at which their corresponding bobbin holders are located, and in this way a, compensating effect is secured throughout the whole series of bobbins and rings. This compensating effect is due to the yielding of the springs which normally tend to hold the arms in the prescribed relation to their brackets or forks in which they are pivoted.

Any yarn which may have a tendency to wrap or pack on the spindle below the bobbin holder will be prevented from so doing by the conical member placed in inverted position on the spindle, for this conical member will by its downward taper prevent the permanent lodgment of the yarn thereon. This packing or permanent lodgment of the yarn would be objectionable, as it would require periodic removal by the operator who would have to cut it away with an expenditure of considerable time and labor. Furthermore, packing of the yarn at this point would interfere with the proper lubrication of the spindles at the points where they pass through the collar board, the packed yarn taking up and holding the oil which should be free to furnish the desired lubrication at this point.

What We claim is 1. A spinning machine of the class described including a bobbin holder, at spindle carrying the bobbin holder and provided below the same with a downwardly tapered or conical portion adapted to shed the yarn and means for clamping the yarn for doliing, said clamping means being normally depressed and clamping the yarn when raised to the dle above the collar board, a bobbin holder mounted on the spindle above the inverted conical sleeve and clamping means for the yarn to clamp the yarn when raised to its highest position, substantially as described.

3. In combination. in a spinning machine, a bobbin holder, a spindle, a washer below the bobbin holder, a conical member on the spindle in inverted position, and a clamping member encircling the conical member and acting in conjunction with the conical member and the washer to clamp the yarn for dofling, substantially as described.

4. In combination, a series of bobbin holders, a series of clamping members, an arm individual to each clamping member for supporting the same, each of said arms being pivotally mounted, a common support for said arms movably mounted to raise the arms to clamping position and spring means applying tension to the arms whereby said arms may yield to compensate for variations in the heights of the bobbin holders, substantially as described.

5. In combination a series of bobbin holders, a clamping ring arranged below each bobbin holder to clamp the yarn, ring seat members, said members being formed in sections to permit the placing or removal of the clamping rings, arms carrying said sectional members, a shaft to which the said arms are connected and by which said arms may be raised simultaneously, each of said arms being yieldingly mounted to compensate for variations in the heights of the bobbin holders, substantially as described.

In testimony wherof we aflix our signatu s.

re ARTHUR F. POIRIER.

THOMAS J. MONROE. 

